PDF Splitter
Split a PDF into pages, custom groups, equal-sized parts or chapters from top-level bookmarks.
Local limits: Max single file: 60 MB
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What you get
A ZIP with one PDF per page, custom group, N pages or top-level bookmark chapter. Bookmark mode includes chapters.json with titles and source page ranges. Front matter before the first bookmark is retained separately. Originals stay unchanged.
Limits and important details
Bookmark mode: 10 MiB input, 200 pages, 40 chapters, 200 outline items, depth 8, 40 MiB output. Local destinations only; top-level starts must be distinct and increasing. Nested bookmarks must stay within their chapter and are remapped; bookmark styles/open state and document metadata are not preserved. Forms, links, annotations, encryption and cross-chapter outlines are unsupported. Other modes: 200 files, 500 output pages, 60 MiB, no guaranteed bookmark/form preservation. Saving invalidates signatures. ZIP is not PDF input.
Example
Custom groups 1-2; 3-5; 6, 8 create three PDFs. In bookmark mode, chapter starts on pages 3 and 6 of an eight-page PDF produce front matter 1-2 and chapters 3-5 and 6-8. This uses bookmarks, not headings recognized from page text.